JPS6317720A - Alignment of belt - Google Patents

Abstract

PURPOSE:To facilitate the alignment of belts, by providing such a method that after several endless belts made of resilient materials are inserted on two paral lel shafts spaced from each other by a predetermined distance, the space be tween both shafts are enlarged to stretch the belts while one of the shafts is rotated. CONSTITUTION:Several endless belts 9 are inserted onto two shafts 4, 7 which are attached in parallel with a predetermined space therebetween. Then, the shaft 7 is pushed in the direction of the arrow A by means of an air cylinder 6 overcoming the force of a spring 8, to enlarge the space of the shafts 4, 7 in order to stretch the belts 9 while the shaft 4 is rotated by means of a motor 2. With this arrangement, the belts 9 are automatically aligned on the shaft 4 due to the resiliency of the belts 9 and the torque for rotation. Accordingly, it is possible to automatically stretch the belts between pulleys, thereby it is possible to enhance the productivity.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a belt alignment method for aligning a large number of belts made of elastic material in a line.

[Conventional technology]

For example, in a power transmission system between a pulley that rotates integrally with a reel stand drive bobbin in a VTR and a capstan flywheel, the rotational force of the driving pulley is efficiently transmitted to the driven pulley. In this case, a method is generally adopted in which a belt made of an elastic material is stretched between both pulleys. The belt used here generally has a rectangular cross section due to manufacturing problems.

When winding such a belt between both pulleys using an automatic machine, use a vacuum or gripping device to wrap the belt once.
It is effective to feed the books one by one to the conveyor, and therefore it is necessary to pre-align a number of belts in a line prior to such operation.

[Problem that the invention seeks to solve]

However, since this type of belt is flexible and has a temperature of zero, it is extremely difficult to align a large number of belts in a line so that they are not aligned with each other.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a belt alignment method that solves the above-mentioned problems of the prior art and can easily align a large number of belts.

[Means for solving problems]

The above-mentioned object of the present invention is to insert a large number of belts in a relaxed state through two shafts extending in parallel while keeping a predetermined distance apart, and then
This is generally achieved by widening the distance between these axes to apply an internal stress in the contraction direction to the bell, and by rotating the other one about one of the two axes.

[Effect]

That is, in a large number of belts inserted in a relaxed state through two shafts, an internal stress is generated in which the belts tend to contract individually by increasing the distance between the two shafts. If one shaft is rotated around the other shaft in such a state, the individual belts with internal stress will tend to push their way between the overlapping belts. It is possible to arrange them in a line so that they do not occur.

〔Example〕

Embodiments of the present invention will be described below with reference to FIGS. 1 to 5.

FIG. 1 is a side view of a belt alignment device according to an embodiment of the present invention, and FIG. 2 is a front view thereof.

In these figures, reference numeral 1 denotes a support body, and a motor 2 is provided on one side of the support body 1 as an example of a rotational drive source, and a rotary shaft of the motor 2 is provided on the other side of the support body 1. A rotating body 3 that is continuously rotated is provided. 4 is rotating body 3
A fixed shaft 7 is fixed at the rotation center position of the fixed shaft 4.
The rotating shaft 7 is fixed to a sliding piece 5 that is slidable in the radial direction of the fixed shaft 4 (in the direction of arrow A in the figure) by a sliding drive source such as an air cylinder 6. A return spring 8 is installed between this sliding piece and the rotating body 3.

Next, a method of aligning a large number of belts in a line using the belt aligning device configured as described above will be explained with particular reference to FIGS. 3 to 5.

First, as shown in FIG. 3, a large number of belts 9 are inserted and set between the fixed shaft 4 and the rotating shaft 7.

In this case, the distance between the fixed shaft 4 and the rotating shaft 7 is such that they are close to each other so that the belt 9 can be easily inserted.

Next, the air cylinder 6 is driven to widen the distance between the fixed shaft 4 and the rotary shaft 7 (the rotary shaft 7 is moved in the direction of arrow A in FIG. 3), and each belt 9 is moved as shown in FIG. Apply internal stress in the direction of contraction to In this case, as shown in FIG. 5(a), a force in the direction of arrow P is generated in the belt 9-h overlapping the adjacent belt 9-α due to the internal stress.

When the motor 2 is driven in this state and the rotary shaft 7 is rotated about the fixed shaft 4 in the direction of arrow B in FIG. The horizontal component P1 and vertical component Pt of the internal stress P force the adjacent lower belt 9-α to expand laterally. When the rotating shaft 7 is continuously rotated in this way, as shown in Fig. 5? As shown in j, each belt 9 is aligned in a line between the fixed shaft 4 and the rotating shaft 7.

After the distance between the fixed shaft 4 and the rotating shaft 7 is reduced to the original state by the return spring 8, the belts 9 aligned in this manner are separated one by one using a vacuum or an appropriate gripping device, and then conveyed to the conveyor. etc., and then installed between a drive-side pulley and a supply-side pulley, also not shown.

〔Effect of the invention〕

As explained above, according to the invention, a large number of belts can be aligned in a line without overlapping each other by rotating one axis around the other axis and increasing the distance between these axes. can be aligned.

[Brief explanation of drawings]

The figures all relate to one embodiment of the present invention, in which Fig. 1 is a side view of the belt aligning device, Fig. 2 is a front view thereof, and Fig. 3 (a) is a side view showing a state in which a large number of belts are inserted into the shaft. Figure, Figure 3 (
B) is its front view, FIG. 4(A) is a side view showing the state in which many belts are pushed out, and FIG. 4(B) is its front view.
FIGS. 5(a), 5(0), and 5(c) are explanatory diagrams showing the belt alignment operation. 4...Fixed axis 7...Rotating axis 9...
Belt,... 1'puff; ゛puff

Claims (1)

[Claims] 1. In a belt alignment method in which a plurality of ring-shaped belts made of elastic material are aligned in a line, a large number of the belts are inserted through two shafts extending in parallel while maintaining a predetermined distance, and then the distance between these shafts is determined. 1. A method for aligning belts, comprising expanding the belts to apply internal stress in the direction of contraction to the belts, and rotating one axis about the other axis.